Toy building-block.



QKMQMQ; pr 3% -6 Q {M No. 879,455; PATENTED FEB. 18, 1908.

0. w. FROST. TOY BUILDING BLOCK.

APPLICATION FILED ELY 29, 1907.

b1 ease:

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CHARLES W. FROST, OF PHILADELPHIA, PENNSYLVANIA.

TOY BUILDING-BLOCK.

Specification of Letters Patent.

Patented Feb. 18, 1908.

Application filed May 29.1907. Serial No. 376.316.

To all whom it may concern:

Be it known that I, CHARLES W. FRosT, a citizen of the United States,residing at Philadelphia, in the county of Philadelphia and State ofPennsylvania, have invented certain new and useful Improvements in ToyBuilding-Blocks, of which the following is a specification.

This invention relates to improvements in toy blocks, and has particularreference to that class of blocks used in building toy structures, andit has for its object the provision of a neat and inexpensive blockhaving I view of the block showing the cross grooves or channels in oneface thereof. Fig. 2 is a similar view showing the projections on theopposite face thereof. Fig. 3 shows a number of these blocks assembledin a structure and held in engagement with one another. Fig. 4 is a planview of one of the blocks showing the cross-grooves or channels therein,and the positions occupied by the projections on an interlocking blockwhen engaged therewith, said positions being indicated in dotted lines.Fig. 5 is an end view of several of my improved blocks assembled andlocked in position.

Referring to the drawing, the numerall indicates the block, 2, 2,longitudinal grooves or channels, preferably squared, and 3, 3,transverse grooves or channels, also preferably squared, in one face ofsaid block.

These grooves or channels may be made by a saw, or other suitablecutting tool, and inter sect the smooth faces of the block, as shown,

\ by passing the cutting tool across the face of said block in onedirection, and then across said face in a transverse direction, as isevident.

It will be observed that at the intersection of these grooves orchannels a seat 4 is formed, and is for a purpose hereinafter stated. Onthe opposite face of said block are a series of projections 5,preferably squared, and are sufficiently small to set into the seats 4in the grooved face of a block, and to hold the block thus engagedlocked in yielding engagement. These )rojections are formed on the faceof the bloc by a saw, or other suitable cutting tool; said saw or othertool being run across said face obliquely to the sides thereof, so thatwhen said projections are finished the sides thereof will be at an angleto the sides of the block. By reason of this construction of theseprojections 5, these blocks when engaged will have a slight longitudinaland also a slight transverse play, which is very advantageous inassembling them in a structure, as it allows for swelling and shrinkagein the blocks.

Having thus described my invention, what I claim is 1. A toy blockhaving on one of its faces a series of squared projections, the sides ofsaid projections being arranged obliquely to the sides and ends of saidblock.

2. A toy block having in one face thereof intersecting grooves orchannels, and on its opposite face a series of squared projections, thesides of said projections being arranged obliquely to the sides of theblock.

In testimony whereof I affix my signature, in presence of two witnesses.

CHARLES W. FROST.

l/Vitnesses:

Tnos. D. MowLns, SADIE I. HARPER.

